ML042960327: Difference between revisions

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{{#Wiki_filter:Preliminary Sequence of Events 06/14/2004 PVNGS LOOP Time (APS)     Time (SRP)       T+           Event 07:40:55.747   07:40:55.790                 Fault inception, C phase to ground, 115"h Ave and Union Hills (Westwing - Liberty line) 07:40:55.814                     4.0 cycles   Westwing breaker 1126 opens 07:40:55.822                     8.5 cycles   Liberty breaker 1282 opens 07:40:56.115   07:40:56.118     22.1         BreakersAFX732 andAFX735 open cycles       SEL-321 directionalground time overcurrent 07:40:56.136                     23.3         Westiving breakers 1426 and 1522 open cycles 07:40:56.165                     25.1         Deer Valley breakers 322, 722, and 962 open cycles 07:40:56.172                     25.5         Westwing 1726 and 1822 open cycles 07:40:56.515                     46.1         Westwing 1222 opens cycles 07:40:59.489     3.7 sec     Hassayampa935 and 938 open (Arlington Valley Line)
{{#Wiki_filter:Preliminary Sequence of Events 06/14/2004 PVNGS LOOP Time (APS)
Received direct transfer tripfrom Arlington 07:41:01.982                               l Faultbecomes phase B and C to ground 07:41:02.154                                 Fault becomes phase C to ground 07:41:02.799                                 Fault becomes phase B and C to ground 07:41:07.851     12.06 sec   PVNGSSwitchyard975 and 972 open (Hassayampa#2 line) trips on broken conductor detection 04:41:07.875     12.08 sec   PVNGSSwitchyard982 and 985 open (Hassaymapa# 3 line) trips on broken conductor detection 07:41:07.88     12.09 sec   PVNGSSwitchyard 942 and 945 open (Hassaymapa# I line) trips on broken conductor detection 07:41:08.104                                 Fault becomes phase A. B, C to ground 07:41:20.005     24.21 sec   PVNGSSwitchyard992 opens (Devers line) 07:41:20.113     24.32 sec   PVNGS Switchyard 932 and 935 open (Rudd line)
Time (SRP)
GE D60, P077 (permissive overreachingtransfer trip) 07:41:20.864     25.07 sec   PVNGSSwitchyard912 and 915 open (Westving I line)
T+
SEL-321, POT 07:41:20.895   25.10 sec   PVNGS SWitchyard 922 and 925 open       (Westving 2 line)
Event 07:40:55.747 07:40:55.790 Fault inception, C phase to ground, 115"h Ave and Union Hills (Westwing - Liberty line) 07:40:55.814 4.0 cycles Westwing breaker 1126 opens 07:40:55.822 8.5 cycles Liberty breaker 1282 opens 07:40:56.115 07:40:56.118 22.1 Breakers AFX732 andAFX735 open cycles SEL-321 directional ground time overcurrent 07:40:56.136 23.3 Westiving breakers 1426 and 1522 open cycles 07:40:56.165 25.1 Deer Valley breakers 322, 722, and 962 open cycles 07:40:56.172 25.5 Westwing 1726 and 1822 open cycles 07:40:56.515 46.1 Westwing 1222 opens cycles 07:40:59.489 3.7 sec Hassayampa 935 and 938 open (Arlington Valley Line)
GED60, POT 07:41:23.848   28.06 sec   PVNGSSivitchyard988 opens (trips Unit 3) 07:41:24.641   28.85 sec   PVNGSSwitchyard918 opens (trips UnitI) 07:41:24.652   28.86 sec   PVNGSSwitchyard938 opens (trips Unit 2) 07:41:34.615                     38.868 sec   Faultcleared
Received direct transfer trip from Arlington 07:41:01.982 l Fault becomes phase B and C to ground 07:41:02.154 Fault becomes phase C to ground 07:41:02.799 Fault becomes phase B and C to ground 07:41:07.851 12.06 sec PVNGSSwitchyard 975 and 972 open (Hassayampa #2 line) trips on broken conductor detection 04:41:07.875 12.08 sec PVNGSSwitchyard 982 and 985 open (Hassaymapa # 3 line) trips on broken conductor detection 07:41:07.88 12.09 sec PVNGSSwitchyard 942 and 945 open (Hassaymapa # I line) trips on broken conductor detection 07:41:08.104 Fault becomes phase A. B, C to ground 07:41:20.005 24.21 sec PVNGSSwitchyard992 opens (Devers line) 07:41:20.113 24.32 sec PVNGS Switchyard 932 and 935 open (Rudd line)
: 1. _________     .L           I
GE D60, P077 (permissive overreaching transfer trip) 07:41:20.864 25.07 sec PVNGSSwitchyard 912 and 915 open (Westving I line)
                                                                                          @4 I,}}
SEL-321, POT 07:41:20.895 25.10 sec P VNGS SWitchyard 922 and 925 open (Westving 2 line)
GED60, POT 07:41:23.848 28.06 sec PVNGSSivitchyard 988 opens (trips Unit 3) 07:41:24.641 28.85 sec PVNGSSwitchyard918 opens (trips Unit I) 07:41:24.652 28.86 sec PVNGSSwitchyard 938 opens (trips Unit 2) 07:41:34.615 38.868 sec Fault cleared
: 1. _________  
.L I
@4 I,}}

Latest revision as of 00:32, 16 January 2025

Preliminary Sequence of Events 6/14/2004 PVNGS LOOP
ML042960327
Person / Time
Site: Palo Verde  Arizona Public Service icon.png
Issue date: 06/14/2004
From:
- No Known Affiliation
To:
Office of Nuclear Reactor Regulation
References
FOIA/PA-2004-0307
Download: ML042960327 (1)
v • d • e


Text

Preliminary Sequence of Events 06/14/2004 PVNGS LOOP Time (APS)

Time (SRP)

T+

Event 07:40:55.747 07:40:55.790 Fault inception, C phase to ground, 115"h Ave and Union Hills (Westwing - Liberty line) 07:40:55.814 4.0 cycles Westwing breaker 1126 opens 07:40:55.822 8.5 cycles Liberty breaker 1282 opens 07:40:56.115 07:40:56.118 22.1 Breakers AFX732 andAFX735 open cycles SEL-321 directional ground time overcurrent 07:40:56.136 23.3 Westiving breakers 1426 and 1522 open cycles 07:40:56.165 25.1 Deer Valley breakers 322, 722, and 962 open cycles 07:40:56.172 25.5 Westwing 1726 and 1822 open cycles 07:40:56.515 46.1 Westwing 1222 opens cycles 07:40:59.489 3.7 sec Hassayampa 935 and 938 open (Arlington Valley Line)

Received direct transfer trip from Arlington 07:41:01.982 l Fault becomes phase B and C to ground 07:41:02.154 Fault becomes phase C to ground 07:41:02.799 Fault becomes phase B and C to ground 07:41:07.851 12.06 sec PVNGSSwitchyard 975 and 972 open (Hassayampa #2 line) trips on broken conductor detection 04:41:07.875 12.08 sec PVNGSSwitchyard 982 and 985 open (Hassaymapa # 3 line) trips on broken conductor detection 07:41:07.88 12.09 sec PVNGSSwitchyard 942 and 945 open (Hassaymapa # I line) trips on broken conductor detection 07:41:08.104 Fault becomes phase A. B, C to ground 07:41:20.005 24.21 sec PVNGSSwitchyard992 opens (Devers line) 07:41:20.113 24.32 sec PVNGS Switchyard 932 and 935 open (Rudd line)

GE D60, P077 (permissive overreaching transfer trip) 07:41:20.864 25.07 sec PVNGSSwitchyard 912 and 915 open (Westving I line)

SEL-321, POT 07:41:20.895 25.10 sec P VNGS SWitchyard 922 and 925 open (Westving 2 line)

GED60, POT 07:41:23.848 28.06 sec PVNGSSivitchyard 988 opens (trips Unit 3) 07:41:24.641 28.85 sec PVNGSSwitchyard918 opens (trips Unit I) 07:41:24.652 28.86 sec PVNGSSwitchyard 938 opens (trips Unit 2) 07:41:34.615 38.868 sec Fault cleared

1. _________

.L I

@4 I,

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